I have this one you can read at the bottom of the skinny paper it talks about the reverse side of this American three line hone being finer. I will post the paper on the Three line swaty and anything I can find on the Apart. I have a problem over here I am married and things move around in my house. I am looking !!!!!
I made this argument years ago--that a barber hone that appears to be homogenous yet claims to be two-sided is nothing more than a different finish. I'm going to have to show this to someone!